The numbers here are historical averages based on climate data gathered at the San Diego International Airport, located on San Diego Bay near the city center.

Temperature

66 °F

March average high

19 °C

53 °F

March average low

12 °C

In most years, San Diego averages a daily maximum temperature for March that's between 64 and 68 degrees Fahrenheit (18 to 20 degrees Celsius). The minimum temperature usually falls between 52 and 55 °F (11 to 13 °C).

The days at San Diego warm slightly during March. By the end of the month, the temperature has climbed around 2 °F (1 °C) above what it was at the start.

5 days

70 °F max. or more (21 °C)

6 days

50 °F min. or less (10 °C)

Nearly every day in March warms to over 60 °F (16 °C) in San Diego. The city averages 1 day this month when the thermometer reaches into the 80s °F (over 26 °C). Temperatures above 90 °F (32 °C) occur in March about once a decade.

San Diego does not normally get as cold as 40 °F (4 °C) this time of year.

Rain

1.8 in

total precipitation

46 mm

7 days

of rain

Half the time, San Diego receives one-half to 3 inches (12 to 79 mm) of rainfall in March. One in four years has drier weather, while another one in four is wetter.

Sun

70 %

sunshine

11 days

clear skies

The sun's rays reach the ground in San Diego during 70 percent of daylight hours on average in March, for a total of 260 hours in the month. Typically on 11 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in March at San Diego lasts for 12 hours and 0 minutes a day on average. The shortest day of the month is the 1st with 11 hours and 30 minutes of daylight. By the end of the month, the days have lengthened to 12:31 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humidity

67 %

March average humidity

The relative humidity in San Diego during March usually peaks at 75 percent just after midnight then drops to 56 percent by early afternoon.

Local Time

1 am

4 am

7 am

10 am

1 pm

4 pm

7 pm

10 pm

Humidity %

75

75

73

60

56

59

68

72

Wind

7.5 mph

March wind speed average

12.1 kph

March is a little windier than most other months in San Diego.

Storms

1 day

rainfall of 0.5 inches (13 mm) or more

0 days

with thunderstorms in March

March is one of the most likely months for a thunderstorm in San Diego. Even so, most Marches have no thunder and lightning.

Reference

These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity and thunderstorm statistics are 1961-1990 normals.